number of valence electrons = (main group number) - (charge) (charged atoms) For example, Ca+2 has zero valence electrons. Ca normally has 2 valence electrons but with a 2+ charge it is missing two electrons. F-1 has 8 valence electrons. S-2 has 8 valence electrons.
Dec 04, 2007 · In this particular case we have a variety. The sulfur has a double bond to one oxygen, a single bond to the other oxygen, and also, an unbonded pair of electrons. Altogether that's three groups of...
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